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The F128-F129 set is used to form a tube in a successive number of strokes. The peripheral suface of the form may show evidence of this. To accommodate the required height, a No. F400R adapter must be used. The F128S-F129S set is normally furnished about two feet long. The pre-formed tube is fed thru the die from left to right, sizing the part in two-foot increments. Any length of part can be sized in this manner.
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